Cut-off apparatus for gas or liquid supply pipes.



No; 746,425. PATBNTED DEC. 8.1903. P. W. A. WIEsEBRooK.

CUT-OFP APPARATUS FOR GAS 0R LIQUID SUPPLY PIPES.-Y

APPLIGATION FILED APR. 11, 1903. No MODEL.

mmm

will I Fg) wmmw TN: Nonms PETERS co. PHmo-Llmo, wAsmNmoN. n. c

UNITED STATES Patented December '-8, -1903.

nPATENT OFFICE.

FREDERICK WILLIAM A. WIESEBROCK, OF NEW YORK, N. Y., ASSIGNOR, BY

MESNE ASSIGNMENTS, TO THE EMERGENCY VALVE COMPANY, A CORPO- RATION OFNEW' YORK.

CUT-OFF APPARATUS FOR GAS QR LIQUID SUPPLY PIPES.

SPECIFICATION forming part of Letters Patent lNo. 746,425, datedDecember 8, 1903.

Application filed April 11, 1903.

To all whom it may concern.' l

Beit known that L'FBEDERICK WILLIAM A.

WIESEBROCK, a citizen of the United States, residing at New York city,(Bronx,) county and State of New York, have invented certain new anduseful Improvements in Cut-OE Apparatus for Gas or Liquid Supply Pipes,of which the following is a specification.

This invention relates to an apparatus for Io controlling gases orliquids under pressure in supply-pipes in sucha manner that in case ofbreakage or leakage in the pipe-line the supply of the gas or liquid isautomatically cut off. The apparatus is so constructed that I 5 thesupply of the gas or liquid under normal conditions is not impaired andthat in case of accident the supply is cut 0E Without subjecting thedevice to a violent shock.

In the accompanying drawings, Figure lis zo a vertical longitudinalsection of my improved cut-o apparatus; Fig. 2, a cross-section on line2 2, Fig. l; Fig. 3, a cross-section on line 3 3, Fig. 1'; and Fig. 4, alongitudinal sectionA of a modification of the apparatus.

The letter a. represents a flanged inlet-pipe and b a liangcdoutlet-pipe arranged on opposite sides of a housing c and adapted to betted into a length ofvpipe-line d. This pipeline conveys steam, water,or other gas or 3o liquid under pressure from a boiler or reservoir tothe place of consumption.

Intermediate the inlet a and housing c is arranged a threaded ange ct"for the reception of a threaded ring e, which constitutes a valve-seat.Against this seat is adapted to bear a disk-shaped outlet-valve f,arranged within the inlet a and provided with a valvestem f', which isguided within a bearing e' of ring e and a bearing g' of a rest g.

Upon the housing c is mounted a cylinder h, containing a piston t', thathas a larger surface area than the valve fand is provided with a rodfi', guided at its upper end withinthe hood h of cylinder h. The housingc is divided from the cylinder h by a partition j,

having a central openingl for the passage and guidance of the lower ,endof piston-rod 'i'. To this lower end of the piston-rod is pivoted at i2the upper end of a link It, which passes Serial No. 152,135. (No model.)

through a slotted partf2 of stem f, Fig. 2. 5o

The lower end of 'link lo is pivotally connected by links Z to rest gand by a link m to stemf. The partition] is provided with a ductj, ofsmall diameter, for establishing communication .between the housing cand the lower part of cylinder h beneath piston 'L'. The partition j isfurther provided with openings jz, controlled by upwardlyopeningclackvalvesjg, located within the cylinder beneath the piston. 'Theupper end of cylinder h above piston 'i has a discharge pipe or openingh2 for carrying off leakage and permitting the escape of air.

The inlet a, or pipe-section in front of the valvefcomm unicates withcylinder h beneath piston vl by a channel n, which is of larger diameterthan the ductj. This channel is provided with a cock o, by which theflow of gas or liquid from the inlet to the cylinder may be controlled.Preferably the cock ois operated by a handle o', having worm o2, thatengages a worm-wheel o3, fast on 'the cockspindle, so that a slowmovement only can be imparted to the cock. An index p permits theposition of cock o to be readily ascertained. 1

In use the apparatus is secured within the pipe d, preferably in closeproximity to the boiler, reservoir, &c., so that the pressure from theboiler, &c., tends to close the valve f against its seat e. To turn onthe supply, the cock o'is opened, when the steam, &c., will be admittedinto the cylinder h beneath piston t'. A small portion of the steam willescape through duct j into housing c; but the main body of the steamwill force the piston t' upward. As the area of the piston t' is largerthan that of valvef, the upward movement of the former will throughlinks k Z m open the latter against the boiler-pressure. The steamwillnow be free to How through the open valve f, housing c, and outlet binto the service-pipe, the cock o being closed as4 soon as this flow hasbeen established. During the normal operation of the parts the steamescaping upwardly through the @lack-valves y2 will hold the piston inits raised position, and thus hold the valve f open. If owing tobreakage or leakage in the service-pipe the pressure in housing c isdiminished, the full pressure still operating against valve f will be inexcess of the reduced pressure against piston z', and consequently thevalve Will be closed against its seat. This closing of valve f isaccompanied by a descent of lpiston a', such descent being permitted bythe escape of the steam from the lower part of cylinder h into thehousing c through d uctj, the clackvalves t7'2 being closed through lackof pressure. By the means described a slow descent only of the pistoncan take place, andv consequently a correspondingly slow closing of thevalve is effected, so that sudden shocks or jars to the apparatus orpipe are avoided.

In Fig. 4 the cylinderq is arranged Within the housing r, and the pistons is mounted upon the stem t' of the disk valve t. The partition u hasthe duct u. and clack-valve u2, as above described. The inlet QJconnects with the cylinder q back of the piston by the channel w, havingcock w. The escape of air from the forward part of cylinder q ispermitted by a pipe or vent q'. The operation is the same as describedin relation to the main construction.

What l claim isc In a cut-off apparatus, the combination of anoutlet-valve with a housing, a cylinder, an inclosed piston connected tothe valve, a partition between housing and cylinder having a duct and anopening, and with a clackvalve within the cylinder adapted to controlsaid opening, substantially as specified.

Signed by me at New York city, (Bronx,) New York, this 6th day of April,1903.

FREDERICK WILLIAM A. WIESEBROCK.

Witnesses:

M. WIEsEBRocK, FRANK v. BRIESEN.

